The Helios BA‑S is a monitoring unit designed to oversee the status of fire protection shutters BAE and BAK, sending operational state signals to central building control systems. It is compatible with all nominal diameters (ND) and features a two-way contact switch rated IP65 for reliable protection against dust and water. The device operates at voltages from 12 to 250 V with a maximum load of 5 A (2 A inductive). A 1‑meter connection cable (3 x 0.34 mm²) is included for easy installation and integration.